#ifndef PIL_DefaultStrategy_INCLUDED
#define PIL_DefaultStrategy_INCLUDED


#include "NotificationStrategy.h"
#include "../Types/SharedPtr.h"
#include <vector>


namespace pi {


template <class TArgs, class TDelegate>
class DefaultStrategy: public NotificationStrategy<TArgs, TDelegate>
    /// Default notification strategy.
    ///
    /// Internally, a std::vector<> is used to store
    /// delegate objects. Delegates are invoked in the
    /// order in which they have been registered.
{
public:
    typedef TDelegate*                   DelegateHandle;
    typedef SharedPtr<TDelegate>         DelegatePtr;
    typedef std::vector<DelegatePtr>     Delegates;
    typedef typename Delegates::iterator Iterator;

public:
    DefaultStrategy()
    {
    }

    DefaultStrategy(const DefaultStrategy& s):
        _delegates(s._delegates)
    {
    }

    ~DefaultStrategy()
    {
    }

    void notify(const void* sender, TArgs& arguments)
    {
        for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
        {
            (*it)->notify(sender, arguments);
        }
    }

    DelegateHandle add(const TDelegate& delegate)
    {
        DelegatePtr pDelegate(static_cast<TDelegate*>(delegate.clone()));
        _delegates.push_back(pDelegate);
        return pDelegate.get();
    }

    void remove(const TDelegate& delegate)
    {
        for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
        {
            if (delegate.equals(**it))
            {
                (*it)->disable();
                _delegates.erase(it);
                return;
            }
        }
    }

    void remove(DelegateHandle delegateHandle)
    {
        for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
        {
            if (*it == delegateHandle)
            {
                (*it)->disable();
                _delegates.erase(it);
                return;
            }
        }
    }

    DefaultStrategy& operator = (const DefaultStrategy& s)
    {
        if (this != &s)
        {
            _delegates = s._delegates;
        }
        return *this;
    }

    void clear()
    {
        for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
        {
            (*it)->disable();
        }
        _delegates.clear();
    }

    bool empty() const
    {
        return _delegates.empty();
    }

protected:
    Delegates _delegates;
};


template <class TDelegate>
class DefaultStrategy<void,TDelegate>: public NotificationStrategy<void, TDelegate>
    /// Default notification strategy.
    ///
    /// Internally, a std::vector<> is used to store
    /// delegate objects. Delegates are invoked in the
    /// order in which they have been registered.
{
public:
    typedef TDelegate*                   DelegateHandle;
    typedef SharedPtr<TDelegate>         DelegatePtr;
    typedef std::vector<DelegatePtr>     Delegates;
    typedef typename Delegates::iterator Iterator;

public:
    DefaultStrategy()
    {
    }

    DefaultStrategy(const DefaultStrategy& s):
        _delegates(s._delegates)
    {
    }

    ~DefaultStrategy()
    {
    }

    void notify(const void* sender)
    {
        for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
        {
            (*it)->notify(sender);
        }
    }

    DelegateHandle add(const TDelegate& delegate)
    {
        DelegatePtr pDelegate(static_cast<TDelegate*>(delegate.clone()));
        _delegates.push_back(pDelegate);
        return pDelegate.get();
    }

    void remove(const TDelegate& delegate)
    {
        for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
        {
            if (delegate.equals(**it))
            {
                (*it)->disable();
                _delegates.erase(it);
                return;
            }
        }
    }

    void remove(DelegateHandle delegateHandle)
    {
        for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
        {
            if (*it == delegateHandle)
            {
                (*it)->disable();
                _delegates.erase(it);
                return;
            }
        }
    }

    DefaultStrategy& operator = (const DefaultStrategy& s)
    {
        if (this != &s)
        {
            _delegates = s._delegates;
        }
        return *this;
    }

    void clear()
    {
        for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
        {
            (*it)->disable();
        }
        _delegates.clear();
    }

    bool empty() const
    {
        return _delegates.empty();
    }

protected:
    Delegates _delegates;
};


} // namespace pi


#endif // PIL_DefaultStrategy_INCLUDED
